Device for applying powder compounds.



P. A. NEHRING. DEVICE FOR APPLYING POWDER COMPOUNDS- I APPLICATION FILEDMAYH. 1915. f I

1,187,008; Patented June 13, 1916.

fail Z THE COLUMBIA PuNoGRAPH C0., WASHINGTON, D. C.

I memos.

PAUL A. NEHRING, OF SYCAMOJEtE, ILLINOIS.

IDEVICEFOB APPLYING POWDER COMPOUNDS.

Specification of Letters Patent.

Patented. June 13, 1916.

To all whom it may concern:

Be it known that 1, PAUL A. NEHRING, a citizen of the United States, anda resident of Sycamore, county of Dekalb, and State of Illinois, haveinvented certain new and useful Improvements in ing Powder Compounds,lowing is declared to be a exact description. 7 v

This invention relates to devices for applying powder compounds tolayers of tubular braided coverings for insulated wire, and its objectis to provide a simple and emcient device capable of thoroughly applyingthe powder to a layer of the braided covering just prior to the timethat another tubular layer is braided thereupon. The compounds used arewell-known to those skilled in this art, and are employed for thepurpose of providing insulation for the wire, as it is a very difficultmatter to use liquid compounds whichwill give the best results. Byapplying the insulating powder compound directly to each layer after ithas been braided upon the wire, and before the next layer is woundthereon, the compound is introduced not only into the crevices betweenthe strands of the braid, but into the very pores of the strandsthemselves.

The invention consists in the several novel features of construction andarrangement hereinafter fullyset forth and claimed.

The invention is clearly illustrated in the drawing furnished herewith,in which:

Figure 1 is a central, longitudinal section through a simple form ofdevice embodying the present invention; and Fig. 2 is a horizontalsection taken on the line 2-2 of Fig. 1.

Referringto said drawing, 10 designates a receptacle for containing thepowder compound, which receptacle may be supported upon a frame orplate, 11, associated with a braiding machine (not shown) of any of thecommon, well-known types for applying tubular braided coverings to wire.The braiding machine forms no part of this invention, and for thatreason is not described in this specification, but its function is toapply several tubular coverings of braided fabric around the wire, andthe present device is so arranged with respect to the braiding mechanismthat the tubular braid is applied to the wire as it leaves thereceptacle,

10, in traveling in an upward direction.

of whichthe folfull, clear, and

Devices for Apply-- Preferably, the receptacle, 10, has an upwardlyflaring, open end, 12, at the top, and at its lower end is formed with ahorizontal flanged bottom, 13, which may be bolted or otherwise securedto the supporting frame or plate, 11, by bolts and'nuts, 14. Projectingdown from said flanged bottom, 13, is a sleeve-like member, 15, in whichis rotatively mounted a hollow shaft, 16, said shaft projecting outthrough the lower open end of the sleeve-like member, 15, and having apulley, 17 secured upon said projecting end, adapted to be belted to anysuitable source of power. The hollow shaft, 16, has a flange, 18,- uponits upper end which rests upon an upstanding boss, 19, formed on theflanged bottom, 13, and upward movement of said hollow shaft isprevented by a nut, 20, threaded upon a reduced portion, 21, of thehollow shaft, and bearing against a shoulder, 22, formed thereon andagainst the lower end of the sleeve-like portion, 15. The screw threadedportion, 21, projects down below the hub of the pulley, 17 and upon saidprojecting end of the reduced portion, 21, is screwed a cap, 28, havinga central orifice, 24, upon its lower end wall. An elastic washer, 25,is interposed between the lower end wallof the said cap and the lowerend of the screw threaded portion, 21, of the hollow shaft, 16, and saidelastic washer has a central orifice of the same, or substantially thesame, diameter as the wire which passes through.

Secured to the flanged portion, 18, of the hollow shaft, 16, arestirrers, 27 which are preferably formed upon adisk-like plate, 28,screwed or otherwise secured to the flanged portion, 18, of the shaft,16. Said disk-like plate has a central opening, 29, and the stirrers arebent upward from its marginal edge and converged toward each other, aspace, however, being left between them for the free passage of thewire. Preferably, said stirrers comprise flat strips of metal and aretwisted slightly so as to act as paddles or stirring'fingers in thereceptacle, 10.

In operation, the wire, 30, with a layer of braided fabric thereon, isdrawn upwardly through the center of the device (which is filled orpartially filled with the suitable powder compound), and the pulley, 17,is revolved, thereby effecting the rotation of the stirrers, 27 whichconstantly agitate and stir the powder compound thereby causing it tocontinuously hug the layer of braided fabric around the wire,

pregnate each layer thus insuringthe penetration of the powder compoundinto the crevices between the strands, and also into the pores thereof,and insuring a thorough impregnation of the braid. As the wire leavesthe receptacle at its upper end, a second layer of tubular braid isbraided upon the first layer, thereby confining'the powder compoundbetween the two layers. If more than twolayers of braided fabric are tobe applied, a second powder applying device may be used above the firstone, in position to apply powder before the other tubular braid isapplied to the previouslyapplied tubular layers of braid. In fact, asmany of the powder applying devices may be used as is necessary toimwith the powder compound.

I am aware that various alterations and modifications of this device arepossible without departing from the spirit of this invention, and Idesire, therefore, not to limit myself to the construction shown anddescribed, but intend in the following claims to point out all of theinvention disclosed herein. I

I claim as new and desire to secure by Letters Patent: 7 I

1. The combination with a powder receivin rece tacle havin an orificefor the passage through said receptacle of the article to which powderis to be applied, and a stirrer within said receptacle movable aroundsaid article for agitatingthe powder contained in the receptacle.

2. The combination with a powder receiving receptacle having an orificefor the passage through said receptacle of the ar- Copies of this patentmay be obtained for ticle to which powder is to be applied, ro-

tatively mounted stirrers within said re-.

3. The combination with an upright, tu-

bular powder receiving receptacle having a centrally. located, downwardly projecting, sleeve-like member, a hollow shaft journaled insaid sleeve-like member and through which an article may pass into andthrough said receptacle, and stirrers mounted upon said shaft foragitating the powder contained in the receptacle.

4. The combination of an upright, tubular, powder receiving receptacle,having a downwardly projecting, centrally located, sleeve-like member, ahollow shaft journaled in said sleeve-like member, a pulley on saidshaft, and a stirrer mounted upon said shaft within the powder receivingreceptacle and having converging stirring fingers arranged to rotatebodily about the article to be impregnated with the powder.

5. The combination of an upright, pow der receiving receptacle having abottom formed with an upstanding boss and a downwardly projectingsleeve-like member, a hollow shaft within said sleeve-like member andhaving a flange resting upon said upstanding boss, said hollow shaftprojecting below said sleeve-like member and having a pulley securedthereon, a closure for the lower end of said shaft formed with acentrally located aperture through which an article to be impregnatedwith powder, is moved, and a stirrer carried by said flange of thehollow shaft and having stirring fingers arranged to rotate bodilyaround the article to be impregnated with powder.

- PAUL A. NEHRING.

Commissioner of Patents,

